Verbseoul.
하다 verb
질식하다jilsikhadato choke, to suffocate

To say to choke, to suffocate politely in the present tense, use 질식해요 (cheel-shee-kae-yoh). Below is the full conjugation of 질식하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
질식해
cheel-shee-kae
질식해요
cheel-shee-kae-yoh
질식합니다
cheel-shee-kahm-nee-dah
Past
질식했어
cheel-shee-kae-ssuh
질식했어요
cheel-shee-kae-ssuh-yoh
질식했습니다
cheel-shee-kae-sseum-nee-dah
Future
질식할 거야
cheel-shee-kahl- -guh-yah
질식할 거예요
cheel-shee-kahl- -guh-yae-yoh
질식할 겁니다
cheel-shee-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
질식하세요
cheel-shee-kah-sae-yoh
Suggestion / Let's Polite (요)
질식해요
cheel-shee-kae-yoh
Question Polite (요)
질식해요?
cheel-shee-kae-yoh-?
Connective “and” — (고)
질식하고
cheel-shee-kah-goh
Conditional “if” — (면)
질식하면
cheel-shee-kah-myuhn
Noun form — (기)
질식함
cheel-shee-kahm